Like Staff Model, Staff Model R is a Tour-caliber, 4-piece urethane golf ball that also delivers unmatched precision, speed and consistency. It ™s also the first golf ball to feature an unpainted urethane cover that delivers a lower flight trajectory, and ?grabs ? the wedge surface for enhanced greenside spin. This is the ball for players who demand the utmost in confidence and consistency. This is performance perfected. Technology: V-COR ADVANCED PERFORMANCE - A unique core composition magnifies energy to generate maximum velocity off the clubface for greater distance performance. 4-LAYER SPIN & CONTROL - More layers. Higher spin. Better control. Unmatched distance and shot-shaping off the tee. Tour-level workability on the fairways. Predictable stability on approach shots and exceptional control around the green. UNPAINTED URETHANE COVER - The urethane cover has been left completely unpainted, creating a perfectly even surface for true balance and straighter flight.